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Goals and Objectives for the Semantic Infrastructure 2.0 Roadmap

<CNM: text adopted from caGRID 2.0 text.>comment>
I think that similar text in the caGRID 2.0 RM document could eliminate the need for a specific
"Relationship of caGRID 2.0 to V2 SI" discussion that currently exists in the latter RM document. Thoughts?>
</CNM: text adopted from caGRID 2.0 text.>comment>

The purpose of this document is to define the basic requirements for the next generation – that is, Version 2.0 – of caBIG®-CBIIT Semantic Infrastructure.

"Semantic Infrastructure" is defined as including the collective set of strategies, technologies, and tools that support the publishing and processing of all aspects of data, metadata, terminology, and value set content related to the support for both design-time and run-time computable semantic interoperability (CSI).

As such, Thus it is assumed that semantic infrastructure Semantic Infrastructure 2.0 subsumes the scope of the current caBIG®-CBIIT semantic infrastructure including caDSR and EVS. In particular, the Semantic Infrastructure 2.0 is expected to support relevant aspects of both informational ("static") and behaviorial ("dynamic") metadata , in addition to historical terminology and value-set management functions.

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The Semantic Infrastructure 2.0 Roadmap is being collectively authored by a team with extensive knowledge of the legacy caBIG® semantic infrastructure and the associated lessons learned from its use, as well as the realities of "what works and what doesn't" in the technology world as it moves to "Web 2.0" and "the semantic web." As described in the published process framework for the development of the Semantic Infrastructure 2.0 Roadmap, the goal of the project is to combine the perspectives and inputs of the Semantic Infrastructure 2.0 team of experts with caBIG® community input to provide the content for a roadmap that will guide the development of the next generation of caBIG® semantic infrastructure.
</CNM: taken directly from caGRID RM document. Modified as needed.>

Reference Frameworks for Development of Semantic Infrastructure 2.0

With respect to the overarching technology strategies being adopted to guide the development Semantic Infrastructure 2.0, there are several "givens:"

• Support for legacy semantics as currently represented in caDSR via ISO 11179. It is critical that the semantics currently represented in caDSR and EVS be supported in the V2 SI. However, it is equally important that both current and future caBIG stakeholders understand that as users of the V2 SI, the underlying <<representation>> of legacy semantics may – and in fact will – be markedly different in the V2 SI compared to the legacy SI. One of the primary responsibilities of the V2 SI Roadmap is to specifically identify <<and describe prototypes for>> strategies and tools which will be required to both migrate existing semantic content into the V2 SI as well as support external semantic infrastructures which may be based on representational approaches that differ from those being adopted by the V2 SI.

Semantically-Aware Service-Oriented Architecture (sSOA)

<CNM>
Both the Semantic Infrastructure 2.0 and caGrid 2.0 will be developed and deployed within the context of an overarching approach to enterprise architecture which uses the distributed computing design paradigm commonly referred to as Service-Oriented Architecture (SOA). In addition, because of the fundamental importance of semantics in any architecture approach in the context of the life sciences and healthcare (in the broadest sense of those terms), the SOA being developed by NCI CBIIT as manifested in the Semantic Infrastructure 2.0 and caGRID 2.0, is referred to as a "semantically-aware SOA" (sSOA). It is beyond the scope of this document to discuss in detail the various benefits and goals, core organizing motivations, or fundamental design principles of SOA. However, the following bullet points summarize each of these topics. Interested readers can refer to a number of references including two texts by Thomas Erl: "Principles of Service Design" and "SOA Design Patterns."

Organizing Principles of SOA

• Business-driven
• Vendor-neutral
• Enterprise-centric
• Composition-centric

Benefits and Goals of SOA

• Intrinsic interoperability
• Increased federation
• Increased business and technology alignment
• Increased vendor-diversification options
• Increased IT ROI
• Decreased IT burden
• Increased organizational agility

SOA Design Principles

• Standard Service Contracts
• Service Loose Coupling
• Service Abstraction
• Service Reusability
• Service Autonomy
• Service Statelessness
• Service Discoverability
• Service Composability

Services-Aware Interoperability Framework (SAIF)

The Semantic Infrastructure 2.0 is in large part the operational support for the metadata defined the CBIIT implementation guide for the HL7 Services-Aware Interoperability Framework (SAIF). Readers interested in the specifics of the metadata defined by the CBIIT SAIF implementation guide should consult that document directly http://nci.xxx.xxx^{Image Added}. In particular, the chapter on the Enterprise Conformance and Compliance Framework (ECCF) provides focal point for the definition and representation of the collective set of informational and behavioral metadata which the Semantic Infrastructure 2.0 will support at both design- and run-time (via the caGrid 2.0 platform.)

Relationship of the Semantic Infrastructure 2.0 to caGrid 2.0.

<CNM I'm not sure we need this section in the SI 2.0 RM document – and maybe we don't need it in the other RM either <<if>> we include this content in the Goals and Objectives section as I tried to do above. Thoughts?>

<PST DOCUMENT TEXT AS OF AUGUST 16>
In parallel and fundamentally coordinated with the P/S/T project is a project to define the Roadmap for version 2 of the caBIG® semantic infrastructure, that is, the "next generation" of the current caDSR and EVS semantic infrastructure. The ultimate goal of the two efforts is to produce two complementary but integrated Roadmaps that will enable caGrid 2.0 to provide expanded semantic processing capabilities (when required) including but not limited to run-time service discovery and resolution of semantic queries. Details of the Semantic Infrastructure 2.0 Roadmap will, as is the case for the caGrid 2.0 Roadmap, be publicly available and open for community input.
</PST DOCUMENT TEXT AS OF AUGUST 16>

Expectations and Guidelines for Review and Feedback

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